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→Uncertainties about Global Warming
While the [[Mean Average|average]] [[temperature]] of [[Earth]] seems to be increasing there are some [[uncertainty|uncertainties]] in the [[measurement]]s taken.
*[[Accurate]] [[temperature]] records from [[thermometer]]s only go back around 160 years.
*[[Thermometer]]s that were once in [[rural]] areas are now surrounded by buildings which causes a [[Heat Island Effect|'heat island effect]] ' which makes the readings [[reading]]s unreliable as there is another [[variable]] which has affected their [[temperature]] [[reading]]s.
*Old [[thermometer]]s were far less [[accurate]] than modern [[thermometer]]s. Some [[scientist]]s believe this is what caused an apparent halt in '''global warming''' over the last decade and in fact '''global warming''' didn't stop, we just got better [[thermometer]]s.